package com.hspedu.list_; import java.util.ArrayList; import java.util.Iterator; import java.util.List; @SuppressWarnings({"all"}) public class test506 { public static void main(String[] args) { // List集合的遍历方式(3种) List list = new ArrayList(); list.add(123); list.add(456); list.add(789); System.out.println("====== 1 增强for循环 ======"); for (Object object : list) { System.out.println(object); } System.out.println("====== 2 迭代器 ======"); Iterator iterator = list.iterator(); while (iterator.hasNext()) { Object next = iterator.next(); System.out.println(next); } System.out.println("====== 3 普通for循环 ======"); for (int i = 0; i < list.size(); i++) { System.out.println(list.get(i)); } } }